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<h2><span class="refentrytitle"><a name="GstStructure.top_of_page"></a>GstStructure</span></h2>
<p>GstStructure — Generic structure containing fields of names and values</p>
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<div class="refsect1">
<a name="GstStructure.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstStructure.html#GstStructureForeachFunc" title="GstStructureForeachFunc ()">*GstStructureForeachFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstStructure.html#GstStructureMapFunc" title="GstStructureMapFunc ()">*GstStructureMapFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstStructure.html#GstStructureFilterMapFunc" title="GstStructureFilterMapFunc ()">*GstStructureFilterMapFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new-empty" title="gst_structure_new_empty ()">gst_structure_new_empty</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new-id-empty" title="gst_structure_new_id_empty ()">gst_structure_new_id_empty</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new" title="gst_structure_new ()">gst_structure_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new-valist" title="gst_structure_new_valist ()">gst_structure_new_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new-id" title="gst_structure_new_id ()">gst_structure_new_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-new-from-string" title="gst_structure_new_from_string ()">gst_structure_new_from_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-copy" title="gst_structure_copy ()">gst_structure_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-free" title="gst_structure_free ()">gst_structure_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-name" title="gst_structure_get_name ()">gst_structure_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-has-name" title="gst_structure_has_name ()">gst_structure_has_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-name" title="gst_structure_set_name ()">gst_structure_set_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-name-id" title="gst_structure_get_name_id ()">gst_structure_get_name_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-get" title="gst_structure_id_get ()">gst_structure_id_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-get-valist" title="gst_structure_id_get_valist ()">gst_structure_id_get_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-get-value" title="gst_structure_id_get_value ()">gst_structure_id_get_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-set-value" title="gst_structure_id_set_value ()">gst_structure_id_set_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-take-value" title="gst_structure_id_take_value ()">gst_structure_id_take_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get" title="gst_structure_get ()">gst_structure_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-valist" title="gst_structure_get_valist ()">gst_structure_get_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-value" title="gst_structure_get_value ()">gst_structure_get_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-value" title="gst_structure_set_value ()">gst_structure_set_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-array" title="gst_structure_set_array ()">gst_structure_set_array</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-list" title="gst_structure_set_list ()">gst_structure_set_list</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-take-value" title="gst_structure_take_value ()">gst_structure_take_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set" title="gst_structure_set ()">gst_structure_set</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-valist" title="gst_structure_set_valist ()">gst_structure_set_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-set" title="gst_structure_id_set ()">gst_structure_id_set</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-set-valist" title="gst_structure_id_set_valist ()">gst_structure_id_set_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-remove-field" title="gst_structure_remove_field ()">gst_structure_remove_field</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-remove-fields" title="gst_structure_remove_fields ()">gst_structure_remove_fields</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-remove-fields-valist" title="gst_structure_remove_fields_valist ()">gst_structure_remove_fields_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-remove-all-fields" title="gst_structure_remove_all_fields ()">gst_structure_remove_all_fields</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="returnvalue">GType</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-field-type" title="gst_structure_get_field_type ()">gst_structure_get_field_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-n-fields" title="gst_structure_n_fields ()">gst_structure_n_fields</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-has-field" title="gst_structure_has_field ()">gst_structure_has_field</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-has-field-typed" title="gst_structure_has_field_typed ()">gst_structure_has_field_typed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-is-equal" title="gst_structure_is_equal ()">gst_structure_is_equal</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-is-subset" title="gst_structure_is_subset ()">gst_structure_is_subset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-can-intersect" title="gst_structure_can_intersect ()">gst_structure_can_intersect</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-intersect" title="gst_structure_intersect ()">gst_structure_intersect</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-has-field" title="gst_structure_id_has_field ()">gst_structure_id_has_field</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-id-has-field-typed" title="gst_structure_id_has_field_typed ()">gst_structure_id_has_field_typed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-boolean" title="gst_structure_get_boolean ()">gst_structure_get_boolean</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-int" title="gst_structure_get_int ()">gst_structure_get_int</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-uint" title="gst_structure_get_uint ()">gst_structure_get_uint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-int64" title="gst_structure_get_int64 ()">gst_structure_get_int64</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-uint64" title="gst_structure_get_uint64 ()">gst_structure_get_uint64</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-double" title="gst_structure_get_double ()">gst_structure_get_double</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-string" title="gst_structure_get_string ()">gst_structure_get_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-date" title="gst_structure_get_date ()">gst_structure_get_date</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-date-time" title="gst_structure_get_date_time ()">gst_structure_get_date_time</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-clock-time" title="gst_structure_get_clock_time ()">gst_structure_get_clock_time</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-enum" title="gst_structure_get_enum ()">gst_structure_get_enum</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-fraction" title="gst_structure_get_fraction ()">gst_structure_get_fraction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-array" title="gst_structure_get_array ()">gst_structure_get_array</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-get-list" title="gst_structure_get_list ()">gst_structure_get_list</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-foreach" title="gst_structure_foreach ()">gst_structure_foreach</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-map-in-place" title="gst_structure_map_in_place ()">gst_structure_map_in_place</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-filter-and-map-in-place" title="gst_structure_filter_and_map_in_place ()">gst_structure_filter_and_map_in_place</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-nth-field-name" title="gst_structure_nth_field_name ()">gst_structure_nth_field_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-set-parent-refcount" title="gst_structure_set_parent_refcount ()">gst_structure_set_parent_refcount</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-to-string" title="gst_structure_to_string ()">gst_structure_to_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-from-string" title="gst_structure_from_string ()">gst_structure_from_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate" title="gst_structure_fixate ()">gst_structure_fixate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field" title="gst_structure_fixate_field ()">gst_structure_fixate_field</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field-nearest-int" title="gst_structure_fixate_field_nearest_int ()">gst_structure_fixate_field_nearest_int</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field-nearest-double" title="gst_structure_fixate_field_nearest_double ()">gst_structure_fixate_field_nearest_double</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field-nearest-fraction" title="gst_structure_fixate_field_nearest_fraction ()">gst_structure_fixate_field_nearest_fraction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field-boolean" title="gst_structure_fixate_field_boolean ()">gst_structure_fixate_field_boolean</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstStructure.html#gst-structure-fixate-field-string" title="gst_structure_fixate_field_string ()">gst_structure_fixate_field_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstStructure.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GstStructure.html#GstStructure-struct" title="struct GstStructure">GstStructure</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstStructure.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/gobject-Boxed-Types.html">GBoxed</a>
    <span class="lineart">╰──</span> GstStructure
</pre>
</div>
<div class="refsect1">
<a name="GstStructure.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/gst.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GstStructure.description"></a><h2>Description</h2>
<p>A <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> is a collection of key/value pairs. The keys are expressed
as GQuarks and the values can be of any GType.</p>
<p>In addition to the key/value pairs, a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> also has a name. The name
starts with a letter and can be filled by letters, numbers and any of "/-_.:".</p>
<p><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> is used by various GStreamer subsystems to store information
in a flexible and extensible way. A <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> does not have a refcount
because it usually is part of a higher level object such as <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a>,
<a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>, <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>, <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a>. It provides a means to enforce mutability
using the refcount of the parent with the <a class="link" href="GstStructure.html#gst-structure-set-parent-refcount" title="gst_structure_set_parent_refcount ()"><code class="function">gst_structure_set_parent_refcount()</code></a>
method.</p>
<p>A <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> can be created with <a class="link" href="GstStructure.html#gst-structure-new-empty" title="gst_structure_new_empty ()"><code class="function">gst_structure_new_empty()</code></a> or
<a class="link" href="GstStructure.html#gst-structure-new" title="gst_structure_new ()"><code class="function">gst_structure_new()</code></a>, which both take a name and an optional set of
key/value pairs along with the types of the values.</p>
<p>Field values can be changed with <a class="link" href="GstStructure.html#gst-structure-set-value" title="gst_structure_set_value ()"><code class="function">gst_structure_set_value()</code></a> or
<a class="link" href="GstStructure.html#gst-structure-set" title="gst_structure_set ()"><code class="function">gst_structure_set()</code></a>.</p>
<p>Field values can be retrieved with <a class="link" href="GstStructure.html#gst-structure-get-value" title="gst_structure_get_value ()"><code class="function">gst_structure_get_value()</code></a> or the more
convenient gst_structure_get_*() functions.</p>
<p>Fields can be removed with <a class="link" href="GstStructure.html#gst-structure-remove-field" title="gst_structure_remove_field ()"><code class="function">gst_structure_remove_field()</code></a> or
<a class="link" href="GstStructure.html#gst-structure-remove-fields" title="gst_structure_remove_fields ()"><code class="function">gst_structure_remove_fields()</code></a>.</p>
<p>Strings in structures must be ASCII or UTF-8 encoded. Other encodings are
not allowed. Strings may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> however.</p>
<p>Be aware that the current <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> / <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> serialization into string
has limited support for nested <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> / <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> fields. It can only
support one level of nesting. Using more levels will lead to unexpected
behavior when using serialization features, such as <a class="link" href="GstCaps.html#gst-caps-to-string" title="gst_caps_to_string ()"><code class="function">gst_caps_to_string()</code></a> or
<a class="link" href="gstreamer-GstValue.html#gst-value-serialize" title="gst_value_serialize ()"><code class="function">gst_value_serialize()</code></a> and their counterparts.</p>
</div>
<div class="refsect1">
<a name="GstStructure.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GstStructureForeachFunc"></a><h3>GstStructureForeachFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstStructureForeachFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field_id</code></em>,
                            <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>A function that will be called in <a class="link" href="GstStructure.html#gst-structure-foreach" title="gst_structure_foreach ()"><code class="function">gst_structure_foreach()</code></a>. The function may
not modify <em class="parameter"><code>value</code></em>
.</p>
<div class="refsect3">
<a name="GstStructureForeachFunc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>field_id</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field name</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstStructureForeachFunc.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the foreach operation should continue, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if
the foreach operation should stop with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstStructureMapFunc"></a><h3>GstStructureMapFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstStructureMapFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field_id</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>A function that will be called in <a class="link" href="GstStructure.html#gst-structure-map-in-place" title="gst_structure_map_in_place ()"><code class="function">gst_structure_map_in_place()</code></a>. The function
may modify <em class="parameter"><code>value</code></em>
.</p>
<div class="refsect3">
<a name="GstStructureMapFunc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>field_id</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field name</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstStructureMapFunc.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the map operation should continue, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if
the map operation should stop with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstStructureFilterMapFunc"></a><h3>GstStructureFilterMapFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstStructureFilterMapFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field_id</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>A function that will be called in <a class="link" href="GstStructure.html#gst-structure-filter-and-map-in-place" title="gst_structure_filter_and_map_in_place ()"><code class="function">gst_structure_filter_and_map_in_place()</code></a>.
The function may modify <em class="parameter"><code>value</code></em>
, and the value will be removed from
the structure if <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> is returned.</p>
<div class="refsect3">
<a name="GstStructureFilterMapFunc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>field_id</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field name</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstStructureFilterMapFunc.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the field should be preserved, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if it
should be removed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new-empty"></a><h3>gst_structure_new_empty ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new_empty (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Creates a new, empty <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> with the given <em class="parameter"><code>name</code></em>
.</p>
<p>See <a class="link" href="GstStructure.html#gst-structure-set-name" title="gst_structure_set_name ()"><code class="function">gst_structure_set_name()</code></a> for constraints on the <em class="parameter"><code>name</code></em>
 parameter.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new-empty.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>name of new structure</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new-empty.returns"></a><h4>Returns</h4>
<p>a new, empty <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new-id-empty"></a><h3>gst_structure_new_id_empty ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new_id_empty (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> quark</code></em>);</pre>
<p>Creates a new, empty <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> with the given name as a GQuark.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new-id-empty.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>quark</p></td>
<td class="parameter_description"><p>name of new structure</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new-id-empty.returns"></a><h4>Returns</h4>
<p>a new, empty <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new"></a><h3>gst_structure_new ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *firstfield</code></em>,
                   <em class="parameter"><code>...</code></em>);</pre>
<p>Creates a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> with the given name.  Parses the
list of variable arguments and sets fields to the values listed.
Variable arguments should be passed as field name, field type,
and value.  Last variable argument should be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>name of new structure</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>firstfield</p></td>
<td class="parameter_description"><p>name of first field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>additional arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new-valist"></a><h3>gst_structure_new_valist ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new_valist (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *firstfield</code></em>,
                          <em class="parameter"><code><span class="type">va_list</span> varargs</code></em>);</pre>
<p>Creates a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> with the given <em class="parameter"><code>name</code></em>
.  Structure fields
are set according to the varargs in a manner similar to
<a class="link" href="GstStructure.html#gst-structure-new" title="gst_structure_new ()"><code class="function">gst_structure_new()</code></a>.</p>
<p>See <a class="link" href="GstStructure.html#gst-structure-set-name" title="gst_structure_set_name ()"><code class="function">gst_structure_set_name()</code></a> for constraints on the <em class="parameter"><code>name</code></em>
 parameter.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>name of new structure</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>firstfield</p></td>
<td class="parameter_description"><p>name of first field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>varargs</p></td>
<td class="parameter_description"><p>variable argument list</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new-valist.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new-id"></a><h3>gst_structure_new_id ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new_id (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> name_quark</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field_quark</code></em>,
                      <em class="parameter"><code>...</code></em>);</pre>
<p>Creates a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> with the given name as a GQuark, followed by
fieldname quark, GType, argument(s) "triplets" in the same format as
<a class="link" href="GstStructure.html#gst-structure-id-set" title="gst_structure_id_set ()"><code class="function">gst_structure_id_set()</code></a>. Basically a convenience wrapper around
<a class="link" href="GstStructure.html#gst-structure-new-id-empty" title="gst_structure_new_id_empty ()"><code class="function">gst_structure_new_id_empty()</code></a> and <a class="link" href="GstStructure.html#gst-structure-id-set" title="gst_structure_id_set ()"><code class="function">gst_structure_id_set()</code></a>.</p>
<p>The last variable argument must be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> (or 0).</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>name_quark</p></td>
<td class="parameter_description"><p>name of new structure</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_quark</p></td>
<td class="parameter_description"><p>the GQuark for the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new-id.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-new-from-string"></a><h3>gst_structure_new_from_string ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_new_from_string (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *string</code></em>);</pre>
<p>Creates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> from a string representation.
If end is not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a pointer to the place inside the given string
where parsing ended will be returned.</p>
<p>The current implementation of serialization will lead to unexpected results
when there are nested <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> / <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> deeper than one level.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-new-from-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>string</p></td>
<td class="parameter_description"><p>a string representation of a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-new-from-string.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
when the string could not be parsed. Free with
<a class="link" href="GstStructure.html#gst-structure-free" title="gst_structure_free ()"><code class="function">gst_structure_free()</code></a> after use. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-copy"></a><h3>gst_structure_copy ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_copy (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Duplicates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> and all its fields and values.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-copy.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> to duplicate</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-copy.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-free"></a><h3>gst_structure_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_free (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Frees a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> and all its fields and values. The structure must not
have a parent when this function is called.</p>
<div class="refsect3">
<a name="gst-structure-free.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> to free. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-name"></a><h3>gst_structure_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_structure_get_name (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Get the name of <em class="parameter"><code>structure</code></em>
 as a string.</p>
<div class="refsect3">
<a name="gst-structure-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-name.returns"></a><h4>Returns</h4>
<p> the name of the structure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-has-name"></a><h3>gst_structure_has_name ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_has_name (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Checks if the structure has the given name</p>
<div class="refsect3">
<a name="gst-structure-has-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>structure name to check for</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-has-name.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>name</code></em>
matches the name of the structure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-name"></a><h3>gst_structure_set_name ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set_name (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Sets the name of the structure to the given <em class="parameter"><code>name</code></em>
.  The string
provided is copied before being used. It must not be empty, start with a
letter and can be followed by letters, numbers and any of "/-_.:".</p>
<div class="refsect3">
<a name="gst-structure-set-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>the new name of the structure</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-name-id"></a><h3>gst_structure_get_name_id ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
gst_structure_get_name_id (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Get the name of <em class="parameter"><code>structure</code></em>
 as a GQuark.</p>
<div class="refsect3">
<a name="gst-structure-get-name-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-name-id.returns"></a><h4>Returns</h4>
<p> the quark representing the name of the structure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-get"></a><h3>gst_structure_id_get ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_id_get (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> first_field_id</code></em>,
                      <em class="parameter"><code>...</code></em>);</pre>
<p>Parses the variable arguments and reads fields from <em class="parameter"><code>structure</code></em>
 accordingly.
Variable arguments should be in the form field id quark, field type
(as a GType), pointer(s) to a variable(s) to hold the return value(s).
The last variable argument should be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> (technically it should be a
0 quark, but we require <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> so compilers that support it can check for
the <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> terminator and warn if it's not there).</p>
<p>This function is just like <a class="link" href="GstStructure.html#gst-structure-get" title="gst_structure_get ()"><code class="function">gst_structure_get()</code></a> only that it is slightly
more efficient since it saves the string-to-quark lookup in the global
quark hashtable.</p>
<p>For refcounted (mini)objects you will receive a new reference which
you must release with a suitable <code class="function">_unref()</code> when no longer needed. For
strings and boxed types you will receive a copy which you will need to
release with either <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> or the suitable function for the boxed type.</p>
<div class="refsect3">
<a name="gst-structure-id-get.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_field_id</p></td>
<td class="parameter_description"><p>the quark of the first field to read</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-id-get.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if there was a problem reading any of the fields (e.g.
because the field requested did not exist, or was of a type other
than the type specified), otherwise <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-get-valist"></a><h3>gst_structure_id_get_valist ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_id_get_valist (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> first_field_id</code></em>,
                             <em class="parameter"><code><span class="type">va_list</span> args</code></em>);</pre>
<p>Parses the variable arguments and reads fields from <em class="parameter"><code>structure</code></em>
 accordingly.
valist-variant of <a class="link" href="GstStructure.html#gst-structure-id-get" title="gst_structure_id_get ()"><code class="function">gst_structure_id_get()</code></a>. Look at the documentation of
<a class="link" href="GstStructure.html#gst-structure-id-get" title="gst_structure_id_get ()"><code class="function">gst_structure_id_get()</code></a> for more details.</p>
<div class="refsect3">
<a name="gst-structure-id-get-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_field_id</p></td>
<td class="parameter_description"><p>the quark of the first field to read</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>args</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-id-get-valist.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if there was a problem reading any of the fields</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-get-value"></a><h3>gst_structure_id_get_value ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
gst_structure_id_get_value (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field</code></em>);</pre>
<p>Get the value of the field with GQuark <em class="parameter"><code>field</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-id-get-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field to get</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-id-get-value.returns"></a><h4>Returns</h4>
<p>the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> corresponding to the field with the given
name identifier. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-set-value"></a><h3>gst_structure_id_set_value ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_id_set_value (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field</code></em>,
                            <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>Sets the field with the given GQuark <em class="parameter"><code>field</code></em>
 to <em class="parameter"><code>value</code></em>
.  If the field
does not exist, it is created.  If the field exists, the previous
value is replaced and freed.</p>
<div class="refsect3">
<a name="gst-structure-id-set-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> representing a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new value of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-take-value"></a><h3>gst_structure_id_take_value ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_id_take_value (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>Sets the field with the given GQuark <em class="parameter"><code>field</code></em>
 to <em class="parameter"><code>value</code></em>
.  If the field
does not exist, it is created.  If the field exists, the previous
value is replaced and freed.</p>
<div class="refsect3">
<a name="gst-structure-id-take-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> representing a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new value of the field. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get"></a><h3>gst_structure_get ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                   <em class="parameter"><code>const <span class="type">char</span> *first_fieldname</code></em>,
                   <em class="parameter"><code>...</code></em>);</pre>
<p>Parses the variable arguments and reads fields from <em class="parameter"><code>structure</code></em>
 accordingly.
Variable arguments should be in the form field name, field type
(as a GType), pointer(s) to a variable(s) to hold the return value(s).
The last variable argument should be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>For refcounted (mini)objects you will receive a new reference which
you must release with a suitable <code class="function">_unref()</code> when no longer needed. For
strings and boxed types you will receive a copy which you will need to
release with either <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> or the suitable function for the boxed type.</p>
<div class="refsect3">
<a name="gst-structure-get.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_fieldname</p></td>
<td class="parameter_description"><p>the name of the first field to read</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if there was a problem reading any of the fields (e.g.
because the field requested did not exist, or was of a type other
than the type specified), otherwise <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-valist"></a><h3>gst_structure_get_valist ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_valist (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <span class="type">char</span> *first_fieldname</code></em>,
                          <em class="parameter"><code><span class="type">va_list</span> args</code></em>);</pre>
<p>Parses the variable arguments and reads fields from <em class="parameter"><code>structure</code></em>
 accordingly.
valist-variant of <a class="link" href="GstStructure.html#gst-structure-get" title="gst_structure_get ()"><code class="function">gst_structure_get()</code></a>. Look at the documentation of
<a class="link" href="GstStructure.html#gst-structure-get" title="gst_structure_get ()"><code class="function">gst_structure_get()</code></a> for more details.</p>
<div class="refsect3">
<a name="gst-structure-get-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_fieldname</p></td>
<td class="parameter_description"><p>the name of the first field to read</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>args</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-valist.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if there was a problem reading any of the fields</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-value"></a><h3>gst_structure_get_value ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
gst_structure_get_value (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>);</pre>
<p>Get the value of the field with name <em class="parameter"><code>fieldname</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-get-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to get</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-value.returns"></a><h4>Returns</h4>
<p>the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> corresponding to the field with the given
name. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-value"></a><h3>gst_structure_set_value ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set_value (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>Sets the field with the given name <em class="parameter"><code>field</code></em>
 to <em class="parameter"><code>value</code></em>
.  If the field
does not exist, it is created.  If the field exists, the previous
value is replaced and freed.</p>
<div class="refsect3">
<a name="gst-structure-set-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new value of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-array"></a><h3>gst_structure_set_array ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set_array (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a> *array</code></em>);</pre>
<p>This is useful in language bindings where unknown GValue types are not
supported. This function will convert a <em class="parameter"><code>array</code></em>
 to <a class="link" href="gstreamer-GstValue.html#GST-TYPE-ARRAY:CAPS" title="GST_TYPE_ARRAY"><code class="literal">GST_TYPE_ARRAY</code></a> and set
the field specified by <em class="parameter"><code>fieldname</code></em>
.  Be aware that this is slower then using
<a class="link" href="gstreamer-GstValue.html#GST-TYPE-ARRAY:CAPS" title="GST_TYPE_ARRAY"><code class="literal">GST_TYPE_ARRAY</code></a> in a <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> directly.</p>
<div class="refsect3">
<a name="gst-structure-set-array.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-list"></a><h3>gst_structure_set_list ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set_list (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a> *array</code></em>);</pre>
<p>This is useful in language bindings where unknown GValue types are not
supported. This function will convert a <em class="parameter"><code>array</code></em>
 to <a class="link" href="gstreamer-GstValue.html#GST-TYPE-LIST:CAPS" title="GST_TYPE_LIST"><code class="literal">GST_TYPE_LIST</code></a> and set
the field specified by <em class="parameter"><code>fieldname</code></em>
. Be aware that this is slower then using
<a class="link" href="gstreamer-GstValue.html#GST-TYPE-LIST:CAPS" title="GST_TYPE_LIST"><code class="literal">GST_TYPE_LIST</code></a> in a <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> directly.</p>
<div class="refsect3">
<a name="gst-structure-set-list.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-take-value"></a><h3>gst_structure_take_value ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_take_value (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>Sets the field with the given name <em class="parameter"><code>field</code></em>
 to <em class="parameter"><code>value</code></em>
.  If the field
does not exist, it is created.  If the field exists, the previous
value is replaced and freed. The function will take ownership of <em class="parameter"><code>value</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-take-value.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new value of the field. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set"></a><h3>gst_structure_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                   <em class="parameter"><code>...</code></em>);</pre>
<p>Parses the variable arguments and sets fields accordingly. Fields that
weren't already part of the structure are added as needed.
Variable arguments should be in the form field name, field type
(as a GType), value(s).  The last variable argument should be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-set.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-valist"></a><h3>gst_structure_set_valist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_set_valist (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                          <em class="parameter"><code><span class="type">va_list</span> varargs</code></em>);</pre>
<p>va_list form of <a class="link" href="GstStructure.html#gst-structure-set" title="gst_structure_set ()"><code class="function">gst_structure_set()</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-set-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>varargs</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-set"></a><h3>gst_structure_id_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_id_set (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> fieldname</code></em>,
                      <em class="parameter"><code>...</code></em>);</pre>
<p>Identical to gst_structure_set, except that field names are
passed using the GQuark for the field name. This allows more efficient
setting of the structure if the caller already knows the associated
quark values.
The last variable argument must be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-id-set.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the GQuark for the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-set-valist"></a><h3>gst_structure_id_set_valist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_id_set_valist (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> fieldname</code></em>,
                             <em class="parameter"><code><span class="type">va_list</span> varargs</code></em>);</pre>
<p>va_list form of <a class="link" href="GstStructure.html#gst-structure-id-set" title="gst_structure_id_set ()"><code class="function">gst_structure_id_set()</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-id-set-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>varargs</p></td>
<td class="parameter_description"><p>variable arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-remove-field"></a><h3>gst_structure_remove_field ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_remove_field (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>);</pre>
<p>Removes the field with the given name.  If the field with the given
name does not exist, the structure is unchanged.</p>
<div class="refsect3">
<a name="gst-structure-remove-field.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-remove-fields"></a><h3>gst_structure_remove_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_remove_fields (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                             <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                             <em class="parameter"><code>...</code></em>);</pre>
<p>Removes the fields with the given names. If a field does not exist, the
argument is ignored.</p>
<div class="refsect3">
<a name="gst-structure-remove-fields.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of more fieldnames to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-remove-fields-valist"></a><h3>gst_structure_remove_fields_valist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_remove_fields_valist (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                    <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                                    <em class="parameter"><code><span class="type">va_list</span> varargs</code></em>);</pre>
<p>va_list form of <a class="link" href="GstStructure.html#gst-structure-remove-fields" title="gst_structure_remove_fields ()"><code class="function">gst_structure_remove_fields()</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-remove-fields-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>varargs</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of more fieldnames to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-remove-all-fields"></a><h3>gst_structure_remove_all_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_remove_all_fields (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Removes all fields in a GstStructure.</p>
<div class="refsect3">
<a name="gst-structure-remove-all-fields.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-field-type"></a><h3>gst_structure_get_field_type ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="returnvalue">GType</span></a>
gst_structure_get_field_type (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                              <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>);</pre>
<p>Finds the field with the given name, and returns the type of the
value it contains.  If the field is not found, G_TYPE_INVALID is
returned.</p>
<div class="refsect3">
<a name="gst-structure-get-field-type.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of the field</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-field-type.returns"></a><h4>Returns</h4>
<p> the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> of the field</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-n-fields"></a><h3>gst_structure_n_fields ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
gst_structure_n_fields (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Get the number of fields in the structure.</p>
<div class="refsect3">
<a name="gst-structure-n-fields.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-n-fields.returns"></a><h4>Returns</h4>
<p> the number of fields in the structure</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-has-field"></a><h3>gst_structure_has_field ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_has_field (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>);</pre>
<p>Check if <em class="parameter"><code>structure</code></em>
 contains a field named <em class="parameter"><code>fieldname</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-has-field.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-has-field.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure contains a field with the given name</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-has-field-typed"></a><h3>gst_structure_has_field_typed ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_has_field_typed (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                               <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                               <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>);</pre>
<p>Check if <em class="parameter"><code>structure</code></em>
 contains a field named <em class="parameter"><code>fieldname</code></em>
 and with GType <em class="parameter"><code>type</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-has-field-typed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>the type of a value</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-has-field-typed.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure contains a field with the given name and type</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-is-equal"></a><h3>gst_structure_is_equal ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_is_equal (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure1</code></em>,
                        <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure2</code></em>);</pre>
<p>Tests if the two <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> are equal.</p>
<div class="refsect3">
<a name="gst-structure-is-equal.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure1</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>structure2</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-is-equal.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the two structures have the same name and field.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-is-subset"></a><h3>gst_structure_is_subset ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_is_subset (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *subset</code></em>,
                         <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *superset</code></em>);</pre>
<p>Checks if <em class="parameter"><code>subset</code></em>
 is a subset of <em class="parameter"><code>superset</code></em>
, i.e. has the same
structure name and for all fields that are existing in <em class="parameter"><code>superset</code></em>
,
<em class="parameter"><code>subset</code></em>
 has a value that is a subset of the value in <em class="parameter"><code>superset</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-is-subset.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>subset</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>superset</p></td>
<td class="parameter_description"><p>a potentially greater <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-is-subset.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>subset</code></em>
is a subset of <em class="parameter"><code>superset</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-can-intersect"></a><h3>gst_structure_can_intersect ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_can_intersect (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *struct1</code></em>,
                             <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *struct2</code></em>);</pre>
<p>Tries intersecting <em class="parameter"><code>struct1</code></em>
 and <em class="parameter"><code>struct2</code></em>
 and reports whether the result
would not be empty.</p>
<div class="refsect3">
<a name="gst-structure-can-intersect.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>struct1</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>struct2</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-can-intersect.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if intersection would not be empty</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-intersect"></a><h3>gst_structure_intersect ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_intersect (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *struct1</code></em>,
                         <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *struct2</code></em>);</pre>
<p>Intersects <em class="parameter"><code>struct1</code></em>
 and <em class="parameter"><code>struct2</code></em>
 and returns the intersection.</p>
<div class="refsect3">
<a name="gst-structure-intersect.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>struct1</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>struct2</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-intersect.returns"></a><h4>Returns</h4>
<p>Intersection of <em class="parameter"><code>struct1</code></em>
and <em class="parameter"><code>struct2</code></em>
. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-has-field"></a><h3>gst_structure_id_has_field ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_id_has_field (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field</code></em>);</pre>
<p>Check if <em class="parameter"><code>structure</code></em>
 contains a field named <em class="parameter"><code>field</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-id-has-field.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field name</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-id-has-field.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure contains a field with the given name</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-id-has-field-typed"></a><h3>gst_structure_id_has_field_typed ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_id_has_field_typed (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> field</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>);</pre>
<p>Check if <em class="parameter"><code>structure</code></em>
 contains a field named <em class="parameter"><code>field</code></em>
 and with GType <em class="parameter"><code>type</code></em>
.</p>
<div class="refsect3">
<a name="gst-structure-id-has-field-typed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> of the field name</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>the type of a value</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-id-has-field-typed.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure contains a field with the given name and type</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-boolean"></a><h3>gst_structure_get_boolean ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_boolean (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                           <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *value</code></em>);</pre>
<p>Sets the boolean pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-boolean.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-boolean.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a boolean, this
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-int"></a><h3>gst_structure_get_int ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_int (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                       <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *value</code></em>);</pre>
<p>Sets the int pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-int.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to an int to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-int.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain an int, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-uint"></a><h3>gst_structure_get_uint ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_uint (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *value</code></em>);</pre>
<p>Sets the uint pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-uint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a uint to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-uint.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a uint, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-int64"></a><h3>gst_structure_get_int64 ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_int64 (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *value</code></em>);</pre>
<p>Sets the <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-int64.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-int64.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a>, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-uint64"></a><h3>gst_structure_get_uint64 ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_uint64 (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *value</code></em>);</pre>
<p>Sets the <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-uint64.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-uint64.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a>, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-double"></a><h3>gst_structure_get_double ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_double (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *value</code></em>);</pre>
<p>Sets the double pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-double.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a gdouble to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-double.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a double, this
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-string"></a><h3>gst_structure_get_string ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_structure_get_string (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>);</pre>
<p>Finds the field corresponding to <em class="parameter"><code>fieldname</code></em>
, and returns the string
contained in the field's value.  Caller is responsible for making
sure the field exists and has the correct type.</p>
<p>The string should not be modified, and remains valid until the next
call to a gst_structure_*() function with the given structure.</p>
<div class="refsect3">
<a name="gst-structure-get-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-string.returns"></a><h4>Returns</h4>
<p>a pointer to the string or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when the
field did not exist or did not contain a string. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-date"></a><h3>gst_structure_get_date ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_date (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> **value</code></em>);</pre>
<p>Sets the date pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the date of the
given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<p>On success <em class="parameter"><code>value</code></em>
 will point to a newly-allocated copy of the date which
should be freed with <a href="/usr/share/gtk-doc/html/glib/glib-Date-and-Time-Functions.html#g-date-free"><code class="function">g_date_free()</code></a> when no longer needed (note: this is
inconsistent with e.g. <a class="link" href="GstStructure.html#gst-structure-get-string" title="gst_structure_get_string ()"><code class="function">gst_structure_get_string()</code></a> which doesn't return a
copy of the string).</p>
<div class="refsect3">
<a name="gst-structure-get-date.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out callee-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-date.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a data, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-date-time"></a><h3>gst_structure_get_date_time ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_date_time (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                             <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                             <em class="parameter"><code><a class="link" href="GstDateTime.html" title="GstDateTime"><span class="type">GstDateTime</span></a> **value</code></em>);</pre>
<p>Sets the datetime pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the datetime of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</p>
<p>On success <em class="parameter"><code>value</code></em>
 will point to a reference of the datetime which
should be unreffed with <a class="link" href="GstDateTime.html#gst-date-time-unref" title="gst_date_time_unref ()"><code class="function">gst_date_time_unref()</code></a> when no longer needed
(note: this is inconsistent with e.g. <a class="link" href="GstStructure.html#gst-structure-get-string" title="gst_structure_get_string ()"><code class="function">gst_structure_get_string()</code></a>
which doesn't return a copy of the string).</p>
<div class="refsect3">
<a name="gst-structure-get-date-time.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a class="link" href="GstDateTime.html" title="GstDateTime"><span class="type">GstDateTime</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out callee-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-date-time.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a data, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-clock-time"></a><h3>gst_structure_get_clock_time ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_clock_time (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                              <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                              <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> *value</code></em>);</pre>
<p>Sets the clock time pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the clock time
of the given field.  Caller is responsible for making sure the field exists
and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-clock-time.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to a <a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-clock-time.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a <a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a>, this
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-enum"></a><h3>gst_structure_get_enum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_enum (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> enumtype</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *value</code></em>);</pre>
<p>Sets the int pointed to by <em class="parameter"><code>value</code></em>
 corresponding to the value of the
given field.  Caller is responsible for making sure the field exists,
has the correct type and that the enumtype is correct.</p>
<div class="refsect3">
<a name="gst-structure-get-enum.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enumtype</p></td>
<td class="parameter_description"><p>the enum type of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a pointer to an int to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-enum.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain an enum of the given
type, this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-fraction"></a><h3>gst_structure_get_fraction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_fraction (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *value_numerator</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *value_denominator</code></em>);</pre>
<p>Sets the integers pointed to by <em class="parameter"><code>value_numerator</code></em>
 and <em class="parameter"><code>value_denominator</code></em>

corresponding to the value of the given field.  Caller is responsible
for making sure the field exists and has the correct type.</p>
<div class="refsect3">
<a name="gst-structure-get-fraction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value_numerator</p></td>
<td class="parameter_description"><p>a pointer to an int to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>value_denominator</p></td>
<td class="parameter_description"><p>a pointer to an int to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-fraction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the values could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a GstFraction, this
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-array"></a><h3>gst_structure_get_array ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_array (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a> **array</code></em>);</pre>
<p>This is useful in language bindings where unknown <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> types are not
supported. This function will convert the <a class="link" href="gstreamer-GstValue.html#GST-TYPE-ARRAY:CAPS" title="GST_TYPE_ARRAY"><code class="literal">GST_TYPE_ARRAY</code></a> into a newly
allocated <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a> and return it through <em class="parameter"><code>array</code></em>
. Be aware that this is
slower then getting the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> directly.</p>
<div class="refsect3">
<a name="gst-structure-get-array.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-array.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a <a class="link" href="gstreamer-GstValue.html#GST-TYPE-ARRAY:CAPS" title="GST_TYPE_ARRAY"><code class="literal">GST_TYPE_ARRAY</code></a>,
this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-get-list"></a><h3>gst_structure_get_list ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_get_list (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                        <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *fieldname</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a> **array</code></em>);</pre>
<p>This is useful in language bindings where unknown <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> types are not
supported. This function will convert the <a class="link" href="gstreamer-GstValue.html#GST-TYPE-LIST:CAPS" title="GST_TYPE_LIST"><code class="literal">GST_TYPE_LIST</code></a> into a newly
allocated GValueArray and return it through <em class="parameter"><code>array</code></em>
. Be aware that this is
slower then getting the <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> directly.</p>
<div class="refsect3">
<a name="gst-structure-get-list.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fieldname</p></td>
<td class="parameter_description"><p>the name of a field</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p>a pointer to a <a href="/usr/share/gtk-doc/html/gobject/gobject-Value-arrays.html#GValueArray-struct"><span class="type">GValueArray</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-get-list.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the value could be set correctly. If there was no field
with <em class="parameter"><code>fieldname</code></em>
or the existing field did not contain a <a class="link" href="gstreamer-GstValue.html#GST-TYPE-LIST:CAPS" title="GST_TYPE_LIST"><code class="literal">GST_TYPE_LIST</code></a>, this
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-foreach"></a><h3>gst_structure_foreach ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_foreach (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                       <em class="parameter"><code><a class="link" href="GstStructure.html#GstStructureForeachFunc" title="GstStructureForeachFunc ()"><span class="type">GstStructureForeachFunc</span></a> func</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Calls the provided function once for each field in the <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. The
function must not modify the fields. Also see <a class="link" href="GstStructure.html#gst-structure-map-in-place" title="gst_structure_map_in_place ()"><code class="function">gst_structure_map_in_place()</code></a>
and <a class="link" href="GstStructure.html#gst-structure-filter-and-map-in-place" title="gst_structure_filter_and_map_in_place ()"><code class="function">gst_structure_filter_and_map_in_place()</code></a>.</p>
<div class="refsect3">
<a name="gst-structure-foreach.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>a function to call for each field. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid only during the call to the method."><span class="acronym">scope call</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>private data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-foreach.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the supplied function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> For each of the fields,
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-map-in-place"></a><h3>gst_structure_map_in_place ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_map_in_place (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code><a class="link" href="GstStructure.html#GstStructureMapFunc" title="GstStructureMapFunc ()"><span class="type">GstStructureMapFunc</span></a> func</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Calls the provided function once for each field in the <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. In
contrast to <a class="link" href="GstStructure.html#gst-structure-foreach" title="gst_structure_foreach ()"><code class="function">gst_structure_foreach()</code></a>, the function may modify but not delete the
fields. The structure must be mutable.</p>
<div class="refsect3">
<a name="gst-structure-map-in-place.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>a function to call for each field. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid only during the call to the method."><span class="acronym">scope call</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>private data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-map-in-place.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the supplied function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> For each of the fields,
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-filter-and-map-in-place"></a><h3>gst_structure_filter_and_map_in_place ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_filter_and_map_in_place (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                       <em class="parameter"><code><a class="link" href="GstStructure.html#GstStructureFilterMapFunc" title="GstStructureFilterMapFunc ()"><span class="type">GstStructureFilterMapFunc</span></a> func</code></em>,
                                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Calls the provided function once for each field in the <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. In
contrast to <a class="link" href="GstStructure.html#gst-structure-foreach" title="gst_structure_foreach ()"><code class="function">gst_structure_foreach()</code></a>, the function may modify the fields.
In contrast to <a class="link" href="GstStructure.html#gst-structure-map-in-place" title="gst_structure_map_in_place ()"><code class="function">gst_structure_map_in_place()</code></a>, the field is removed from
the structure if <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> is returned from the function.
The structure must be mutable.</p>
<div class="refsect3">
<a name="gst-structure-filter-and-map-in-place.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>a function to call for each field. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid only during the call to the method."><span class="acronym">scope call</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>private data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.6">1.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-nth-field-name"></a><h3>gst_structure_nth_field_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_structure_nth_field_name (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> index</code></em>);</pre>
<p>Get the name of the given field number, counting from 0 onwards.</p>
<div class="refsect3">
<a name="gst-structure-nth-field-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>index</p></td>
<td class="parameter_description"><p>the index to get the name of</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-nth-field-name.returns"></a><h4>Returns</h4>
<p> the name of the given field number</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-set-parent-refcount"></a><h3>gst_structure_set_parent_refcount ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_set_parent_refcount (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *refcount</code></em>);</pre>
<p>Sets the parent_refcount field of <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>. This field is used to
determine whether a structure is mutable or not. This function should only be
called by code implementing parent objects of <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>, as described in
the MT Refcounting section of the design documents.</p>
<div class="refsect3">
<a name="gst-structure-set-parent-refcount.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>refcount</p></td>
<td class="parameter_description"><p>a pointer to the parent's refcount. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-set-parent-refcount.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the parent refcount could be set.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-to-string"></a><h3>gst_structure_to_string ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_structure_to_string (<em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Converts <em class="parameter"><code>structure</code></em>
 to a human-readable string representation.</p>
<p>For debugging purposes its easier to do something like this:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="function"><a href="gstreamer-GstInfo.html#GST-LOG:CAPS">GST_LOG</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;structure is %&quot;</span> GST_PTR_FORMAT<span class="gtkdoc opt">,</span> structure<span class="gtkdoc opt">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
This prints the structure in human readable form.</p>
<p>The current implementation of serialization will lead to unexpected results
when there are nested <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> / <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> deeper than one level.</p>
<p>Free-function: g_free</p>
<div class="refsect3">
<a name="gst-structure-to-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-to-string.returns"></a><h4>Returns</h4>
<p>a pointer to string allocated by <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-malloc"><code class="function">g_malloc()</code></a>.
<a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-from-string"></a><h3>gst_structure_from_string ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_structure_from_string (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *string</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **end</code></em>);</pre>
<p>Creates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> from a string representation.
If end is not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a pointer to the place inside the given string
where parsing ended will be returned.</p>
<p>Free-function: gst_structure_free</p>
<div class="refsect3">
<a name="gst-structure-from-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>string</p></td>
<td class="parameter_description"><p>a string representation of a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>end</p></td>
<td class="parameter_description"><p>pointer to store the end of the string in. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-from-string.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
when the string could not be parsed. Free with
<a class="link" href="GstStructure.html#gst-structure-free" title="gst_structure_free ()"><code class="function">gst_structure_free()</code></a> after use. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate"></a><h3>gst_structure_fixate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_structure_fixate (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Fixate all values in <em class="parameter"><code>structure</code></em>
 using <a class="link" href="gstreamer-GstValue.html#gst-value-fixate" title="gst_value_fixate ()"><code class="function">gst_value_fixate()</code></a>.
<em class="parameter"><code>structure</code></em>
 will be modified in-place and should be writable.</p>
<div class="refsect3">
<a name="gst-structure-fixate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field"></a><h3>gst_structure_fixate_field ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                            <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given field with its fixated value.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure field could be fixated</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field-nearest-int"></a><h3>gst_structure_fixate_field_nearest_int ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field_nearest_int
                               (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>,
                                <em class="parameter"><code><span class="type">int</span> target</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given field to the nearest
integer to <em class="parameter"><code>target</code></em>
 that is a subset of the existing field.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-int.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target</p></td>
<td class="parameter_description"><p>the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-int.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure could be fixated</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field-nearest-double"></a><h3>gst_structure_fixate_field_nearest_double ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field_nearest_double
                               (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>,
                                <em class="parameter"><code><span class="type">double</span> target</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given field to the nearest
double to <em class="parameter"><code>target</code></em>
 that is a subset of the existing field.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-double.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target</p></td>
<td class="parameter_description"><p>the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-double.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure could be fixated</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field-nearest-fraction"></a><h3>gst_structure_fixate_field_nearest_fraction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field_nearest_fraction
                               (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>,
                                <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> target_numerator</code></em>,
                                <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> target_denominator</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given field to the nearest
fraction to <em class="parameter"><code>target_numerator</code></em>
/<em class="parameter"><code>target_denominator</code></em>
 that is a subset
of the existing field.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-fraction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target_numerator</p></td>
<td class="parameter_description"><p>The numerator of the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target_denominator</p></td>
<td class="parameter_description"><p>The denominator of the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field-nearest-fraction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure could be fixated</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field-boolean"></a><h3>gst_structure_fixate_field_boolean ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field_boolean (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                    <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> target</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given <em class="parameter"><code>field_name</code></em>
 field to the given
<em class="parameter"><code>target</code></em>
 boolean if that field is not fixed yet.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field-boolean.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target</p></td>
<td class="parameter_description"><p>the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field-boolean.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure could be fixated</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-structure-fixate-field-string"></a><h3>gst_structure_fixate_field_string ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_structure_fixate_field_string (<em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>,
                                   <em class="parameter"><code>const <span class="type">char</span> *field_name</code></em>,
                                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *target</code></em>);</pre>
<p>Fixates a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> by changing the given <em class="parameter"><code>field_name</code></em>
 field to the given
<em class="parameter"><code>target</code></em>
 string if that field is not fixed yet.</p>
<div class="refsect3">
<a name="gst-structure-fixate-field-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>field_name</p></td>
<td class="parameter_description"><p>a field in <em class="parameter"><code>structure</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>target</p></td>
<td class="parameter_description"><p>the target value of the fixation</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-structure-fixate-field-string.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the structure could be fixated</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="GstStructure.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstStructure-struct"></a><h3>struct GstStructure</h3>
<pre class="programlisting">struct GstStructure {
  GType type;
};
</pre>
<p>The GstStructure object. Most fields are private.</p>
<div class="refsect3">
<a name="GstStructure.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody><tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> <em class="structfield"><code><a name="GstStructure-struct.type"></a>type</code></em>;</p></td>
<td class="struct_member_description"><p>the GType of a structure</p></td>
<td class="struct_member_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GstStructure.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a>, <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>, <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>, <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a></p>
</div>
</div>
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